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//
// Copyright 2017 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
// The band plan
#include "magnesium_constants.hpp"
#include "magnesium_radio_control.hpp"
#include <uhd/utils/math.hpp>
/*
* Magnesium Rev C frequency bands:
*
* RX IF frequency is 2.4418 GHz. Have 80 MHz of bandwidth for loband.
* TX IF frequency is 1.8-2.1 GHz (1.95 GHz is best).
*
* For RX:
* Band SW2-AB SW3-ABC SW4-ABC SW5-ABCD SW6-ABC SW7-AB SW8-AB MIX
* WB RF1 01 OFF 111 NA --- NA ---- RF3 001 RF2 01 RF2 01 0
* LB RF2 10 RF5 100 NA --- RF3 0010 RF1 100 RF1 10 RF1 10 1
* 440-530 RF2 10 RF2 001 NA --- RF1 1000 RF1 100 RF2 01 RF2 01 0
* 650-1000 RF2 10 RF6 101 NA --- RF4 0001 RF1 100 RF2 01 RF2 01 0
* 1100-1575 RF2 10 RF4 011 NA --- RF2 0100 RF1 100 RF2 01 RF2 01 0
* 1600-2250 RF2 10 RF3 010 RF2 010 NA ---- RF2 010 RF2 01 RF2 01 0
* 2100-2850 RF2 10 RF1 000 RF1 100 NA ---- RF2 010 RF2 01 RF2 01 0
* 2700+ RF3 11 OFF 111 RF3 001 NA ---- RF2 010 RF2 01 RF2 01 0
*
* For TX:
* Band SW5-AB SW4-AB SW3-X SW2-ABCD SW1-AB SWTRX-AB MIX
* WB RF1 10 RF2 01 RF1 0 NA ---- SHD 00 RF4 11 0
* LB RF2 01 RF1 10 RF2 1 RF3 0010 RF3 11 RF1 00 1
* <800 RF1 10 RF2 01 RF2 1 RF3 0010 RF3 11 RF1 00 0
* 800-1700 RF1 10 RF2 01 RF2 1 RF2 0100 RF2 10 RF1 00 0
* 1700-3400 RF1 10 RF2 01 RF2 1 RF1 1000 RF1 01 RF1 00 0
* 3400-6400 RF1 10 RF2 01 RF2 1 RF4 0001 SHD 00 RF2 10 0
*/
using namespace uhd;
using namespace uhd::usrp;
using namespace uhd::rfnoc;
using namespace uhd::math::fp_compare;
namespace {
/* Note on the RX filter bank:
*
* The RX path has 7 bands, which we call BAND0 through BAND7. BAND0 is the
* lowest frequency band (it goes through F44, the 490 MHz low pass filter,
* on the first channel). BAND7 is the highest frequency band, it goes
* through the 2.7 GHz high pass filter (F43 on the first channel).
*
* For all frequencies, there are gain values where we bypass the filter
* bank. In this case, the band setting does not apply (does not have any
* meaning).
*
* The lowband, when not disabling the filter bank, always goes through
* BAND0, but there are non-lowband frequencies which can also go through
* BAND0.
*
* The following constants define lower cutoff frequencies for each band.
* BAND0 does not have a lower cutoff frequency, it is implied by
* MAGNESIUM_MIN_FREQ. MAGNESIUM_RX_BAND1_MIN_FREQ is the cutover frequency
* for switching from BAND0 to BAND1, and so on.
*
* Bands 1-6 have both high- and low-pass filters (effectively band
* passes). Frequencies need to be chosen to allow as much of the full
* bandwidth through unattenuated.
*/
/* Note on the TX filter bank:
*
* The TX path has 4 bands, which we call BAND0 through BAND3.
* For all frequencies, there are gain values where we bypass the filter
* bank. In this case, the band setting does not apply (does not have any
* meaning).
*
* The lowband, when not disabling the filter bank, always goes through
* BAND0, but there are non-lowband frequencies which can also go through
* BAND0.
*
* The following constants define lower cutoff frequencies for each band.
* BAND0 does not have a lower cutoff frequency, it is implied by
* MAGNESIUM_MIN_FREQ. MAGNESIUM_TX_BAND1_MIN_FREQ is the cutover frequency
* for switching from BAND0 to BAND1, and so on.
*
* On current Magnesium revisions, all filters on the TX filter bank are
* low pass filters (no high pass filters).
* Frequencies need to be chosen to allow as much of the full bandwidth
* through unattenuated (so don't go all the way up to the cutoff frequency
* of that filter, OK).
*/
} // namespace
magnesium_radio_control_impl::rx_band magnesium_radio_control_impl::_map_freq_to_rx_band(
const band_map_t band_map, const double freq)
{
magnesium_radio_control_impl::rx_band band;
if (fp_compare_epsilon<double>(freq) < MAGNESIUM_MIN_FREQ) {
band = rx_band::INVALID_BAND;
} else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_LOWBAND_FREQ) {
band = rx_band::LOWBAND;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(1)) {
band = rx_band::BAND0;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(2)) {
band = rx_band::BAND1;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(3)) {
band = rx_band::BAND2;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(4)) {
band = rx_band::BAND3;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(5)) {
band = rx_band::BAND4;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(6)) {
band = rx_band::BAND5;
} else if (fp_compare_epsilon<double>(freq) <= MAGNESIUM_MAX_FREQ) {
band = rx_band::BAND6;
} else {
band = rx_band::INVALID_BAND;
}
return band;
}
magnesium_radio_control_impl::tx_band magnesium_radio_control_impl::_map_freq_to_tx_band(
const band_map_t band_map, const double freq)
{
magnesium_radio_control_impl::tx_band band;
if (fp_compare_epsilon<double>(freq) < MAGNESIUM_MIN_FREQ) {
band = tx_band::INVALID_BAND;
} else if (fp_compare_epsilon<double>(freq) < MAGNESIUM_LOWBAND_FREQ) {
band = tx_band::LOWBAND;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(1)) {
band = tx_band::BAND0;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(2)) {
band = tx_band::BAND1;
} else if (fp_compare_epsilon<double>(freq) < band_map.at(3)) {
band = tx_band::BAND2;
} else if (fp_compare_epsilon<double>(freq) <= MAGNESIUM_MAX_FREQ) {
band = tx_band::BAND3;
} else {
band = tx_band::INVALID_BAND;
}
return band;
}
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